Docker Without the Confusion

You have followed a dozen Docker tutorials, typed every command correctly, and still cannot explain what a container actually is when someone asks. That gap is not a personal failing; it is what happens when tutorials teach keystrokes instead of the ideas underneath them. This book fills in those ideas: why containers exist, how an image differs from the container built from it, where your data actually lives, how containers find each other on a network, and what every line in a Compose file does. You build one small project across the chapters, writing your own Dockerfile and Compose file by the end, and come away with a method for working out what went wrong when something breaks that no tutorial covers.